249961066 has 4 divisors (see below), whose sum is σ = 374941602. Its totient is φ = 124980532.

The previous prime is 249961031. The next prime is 249961067. The reversal of 249961066 is 660169942.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 217710025 + 32251041 = 14755^2 + 5679^2 .

It is not an unprimeable number, because it can be changed into a prime (249961067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62490265 + ... + 62490268.

Almost surely, 2^249961066 is an apocalyptic number.

249961066 is a deficient number, since it is larger than the sum of its proper divisors (124980536).

249961066 is a wasteful number, since it uses less digits than its factorization.

249961066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124980535.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 249961066 is about 15810.1570517184. The cubic root of 249961066 is about 629.9278207389.

It can be divided in two parts, 24996 and 1066, that added together give a palindrome (26062).

The spelling of 249961066 in words is "two hundred forty-nine million, nine hundred sixty-one thousand, sixty-six".